A gunman opened fire in Sandy Hook Elementary School in Newtown, CT, killing 27 – 18 of which are children – before dying of a self-inflicted gunshot wound.More >>

Residents of Newtown, CT, are memorializing the victims of the Sandy Hook Elementary shooting. A gunman opened fire at the school, killing 26 – including 20 children – before dying of a self-inflicted gunshot wound.More >>

According to CNN, investigators are looking at emails gunman Adam Lanza might have sent and websites he might have visited. Officials said one or more computers were seized from the home where Lanza lived.

Lt. Paul Vance with the Connecticut State Police said in a news conference Monday that they found "very good evidence that our investigators will be able to use in painting the complete picture, the how and, more importantly, the why."

Vance spoke briefly about two survivors from the shooting as well.

"We know two adults were injured and are still recovering from the gunshot wounds they received," he said.

Federal officials also said Lanza had visited shooting ranges in the past, however they have no evidence he went to one recently.

Also Monday, the first two funerals were held for victims of the attack.

Jack Pinto and Noah Ponzer, both 6, were laid to rest following private ceremonies for family and friends. More funeral and memorial services are expected in the coming days for the other 18 children and seven adults killed by the 20-year-old shooter.

Vance said troopers were assigned to the services to ensure safety and privacy.

Schools in Connecticut began classes again Monday, many with an increased police presence, according to multiple city leaders. In Newtown, school officials have not said whether Sandy Hook Elementary will ever be reopened.

"The school building will likely be labeled a crime scene for months. It won't be open until further notice," Vance said.

Authorities are continuing to work around the clock to investigate the murders that took place Friday morning.

Connecticut State Police found Lanza had hundreds of rounds of expanding ammunition designed to do maximum damage when it strikes a target.

"We have begun processing the evidence," Vance said. "Every single facet of the weapons will be analyzed. Every single round of ammunition will be looked at and examined for any kind of physical evidence."

He has also credited the quick response of emergency personnel and the school's staff for preventing more tragedies.

"It broke our hearts when we couldn't save them all," Vance said.

Vigils have been held across the state and the country since Friday in remembrance of the victims, and people have been encouraged to wear green and white, the elementary school's colors or blue and yellow, the Newtown High School colors, in an act of support.

People in the town of Monroe began preparing the Chalk Hill School, closed last year, for students of Sandy Hook, according to WFSB. The school is expected to be ready later this week.

On Sunday, President Barack Obama met with residents of Newtown, including survivors of the shooting and family members of the victims. He also spoke at an interfaith ceremony, reading the children's names and saying "God has called them all home."

Obama told the distraught community that the nation shared in their grief and called them an inspiration for the way they came together to support each other. He also said he would work to prevent future tragedies from happening.

"If there's even one step we can take to save a child, or another parent or another town … then surely we have an obligation to try," Obama said.

Lanza's father, Peter Lanza, released a statement Saturday. He said his family had been cooperating with authorities and would continue to do so.

"Our hearts go out to the families and friends who lost loved ones and to all those who were injured. Our family is grieving along with all those who have been affected by this enormous tragedy," Peter Lanza said in the statement. "No words can truly express how heartbroken we are. We are in a state of disbelief and trying to find whatever answers we can. We too are asking why."

The shooter's first victim appears to be his mother, 52-year-old Nancy Lanza. She was shot multiple times while lying in her bed at home, according to police.

Police said the gunman shot his way into the school, past secured doors, and went on a rampage that lasted about 10 minutes. He used a semi-automatic Bushmaster AR-15 rifle, a Glock 10mm handgun and a Sig-Sauer 9mm handgun, according to Vance.

Law enforcement also found a shotgun inside Lanza's car. They said Lanza died of a self-inflicted gunshot wound inside the school when officers began to move in.

Connecticut Gov. Dannel Malloy held a press conference Monday afternoon, reiterating his sympathy for the families.

"The reality, with respect to the relatives, is that you try to feel their pain but you can't. You try to find some words that you hope will be adequate, knowing that they'll be inadequate. And you see little coffins, and your heart has to ache," said Malloy.

Malloy also called on the federal government to take action on gun control issues.

"Do I think Washington, D.C. needs to get its act together and enact stricter gun control laws on the federal level? You bet I do," he said.

Malloy added that, after hearing comments from President Obama and several Connecticut politicians, he is confident that action will be taken.

It was the second deadliest school shooting in American history. No specific information has been released about the motive of the shooter, although there have been multiple reports he suffered from mental illness.

Investigators piecing together evidence in Newtown school shootingMore>>

A gunman opened fire in Sandy Hook Elementary School in Newtown, CT, killing 27 – 18 of which are children – before dying of a self-inflicted gunshot wound.More >>

Residents of Newtown, CT, are memorializing the victims of the Sandy Hook Elementary shooting. A gunman opened fire at the school, killing 26 – including 20 children – before dying of a self-inflicted gunshot wound.More >>